Milling machine



FIG. 1 is a front perspective view of a milling machine embodying my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is an end elevational view thereof as viewed from the right end of FIG. 2;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is an end elevational view thereof as viewed from the left end of FIG. 2; and

FIG. 6 is a top plan view thereof. 

The ornamental design for a milling machine, substantially as shown. 